diff --git a/lib/brakeman/processors/slim_template_processor.rb b/lib/brakeman/processors/slim_template_processor.rb
index 575f40c4fcd842f5fad2181ec9060407d4268ded..559e4269d686070907342c2148ec237cfc924107 100644
--- a/lib/brakeman/processors/slim_template_processor.rb
+++ b/lib/brakeman/processors/slim_template_processor.rb
@@ -1,4 +1,5 @@
 require 'brakeman/processors/template_processor'
+require 'brakeman/processors/lib/render_helper'
 
 class Brakeman::SlimTemplateProcessor < Brakeman::TemplateProcessor
   include Brakeman::RenderHelper